Donner Octave Guitar Pedal, Harmonic Square Digital Octave Mini Pedal Pitch Shifter 7 Shift Types 3 Tone Modes Sharp Detune Flat True Bypass

So I ended up with 2 Harmonic Square Pedals. Wanting to gift one to a friend, I plugged them both in at the same time, you know... keep the 'good one' hehe. WOW!!!!!! I cannot describe how nice they sound together -running one into another. Used separately they work very well and do what they should (including a killer chorus in the 'detune' setting) but together they sound so rich, deep, full, shimmery and expensive. With both of these on at the same time there is near endless settings just flipping the switch and turning the pitch knob. Easily sounds like a $450 effect. Run these into a tad of reverb/delay and it's absolutely amazing ambient heaven. It could be one of the coolest pedal combo's for shimmer/pitch/chorus/octaving/doubling... SO GLAD I ACCIDENTLY TRIED THIS. So in short, I'm buying my buddy a new one.

Fir the price, your getting some crazy good quality. The controls are wicked smooth and the sound, even smoother. Seriously, the sound quality, especially on detune mode is VERY impressive. I hade a lot of fun experimenting with it. Would highly recommend.

I've been performing with this one for half a year, now, and it has become a fundamental part of my equipment, more so than I expected. I wouldn't even think of going anywhere without it, now. Originally, I got it to fill in bass when the bass guitarist didn't show up. Now, I use it mainly for chorus, which it does quite well. Here's a breakdown of the functions, and how I see them: The +/-2,3,4,5 functions are gimmicks. Unless you're playing an avant garde piece over a chromatic scale, this will never work. Having a harmony tone exactly one set number of steps from the played note can't follow any particular scale, so it's a recipe for failure. This is not a product defect. It's just a fact of music theory. The sharp function may be another matter. My thought was that moving the pitch in whole octaves should be fail-safe. If the note you play is correct, then one octave removed should also be correct. Setting it to -1 octave (flat) works nicely. Setting it to -2 octave (flat) works well enough, but it's too low to be practical, unless I'm riffing on the high E, which I never do for an entire song, so I don't use it. Incidentally, flatting the note means having to play differently, also. -1 flat octave works great with power chords, making them more menacing, especially with all-neck pickups and high distortion, and it also works well for imitating a bass guitar or doing a solo resembling a twelve-string guitar. However, it means needing to play more simply, because it doubles the likelihood of muddiness. However, while the flat octave functions work as expected, the sharp octaves bite the dust. Single notes sound like comic effects, like a drunk duck that inhales helium. They're also delayed a fraction of a second. If an entire chord is strummed with a +1 sharp octave setting it sounds somewhat like a pipe organ, and actually can do a pretty good imitation of phantom of the opera. This, probably, could be listed as an item of bad design, but I didn't get it for this function, so I don't care too much. Lastly, but not least, the detune function gives three different intensities of chorus, described as +10 cents through +30 cents detune in the clockwise direction, and their negative counterparts in the counter-clockwise direction. For the record, detune means the same thing as chorus. Also, the negative versions sound exactly like the positive versions to the human ear. Of these settings, only the most subtle sounds good. In fact, it sounds great. I love it. The other two get a little weird. A power chord on the mild detune sounds richer and fuller. Dirty signal gets the edge smoothed off of it a little, making it more palatable to the average (non-heavy metal) ear. It shimmers well. So, the short of it is that most of the functions are junk, but it has two great features that redeem it. It's not like I want to be crouching down and changing the settings during a performance, so all I really need is one great setting that I can leave it on, and punch it on or off at will. I'm quite happy with it. I only dock one star because I feel that the octave sharp function really could have worked better.

Donner’s pedal reviews are all mixed together! This one is for the "Harmonic Square" pitch shifter. To start, the main description is misleading. It is much more than an octave effect, offering many other intervals. It also has microshift/chorus effects. When I read the deeper description, the pedal sounded like the exact feature set I had been looking for among other octaver/pitch shifter products. Nothing does exactly what this does, specifically in this micro form factor, it is really amazing how much the Donner packs in. It was not much of a risk given Amazon’s return policy, so I went for it. I’ve played a lot of pedals in this category, and the Donner holds it’s own on sound and tracking extremely well. Also very low noise. And all for this price?? It’s really a steal. It kind of puts a lot of other name brand and boutique pedals in its class to shame. Not a sexy as a package as the boutique builders, but who cares when it’s this good on price and features? Time will tell with long term reliability, but the build quality seems great.

Worked well in the beginning, but stopped working after 6 months. Will not detune a half step (toggle switch has become loose and is not changing the pitch). And now when you turn it on there is a hum that was not there when I first began using the pedal. Guess I need to buy something that will last more than 6 months...

The Donner Harmonic Pedal is a winner, especially at this price. Though the basic pedal function is a pitch shifting pedal meaning depending on where you set the middle knob and the toggle switch you can get your standard pitch plus an octave above or below in addition semitones above or below. The wet signal (octave) level can be adjusted as well as the dry guitar signal. This pedal is what I would describe as application specific in other words used on its own it might be too dissonant for most situations. In this demo/review I have attempted to show some possible uses but certainly not all of how it could be utilized. Tone being a goal of most guitarists; in that our basic tonal personality can easily be hijacked by a unusual sounding pedal, blending dissonance with your basic sound (tone) can add a dimension to your musical impact. This is not a substitute for lower register or higher register instruments but can be used effectively by carefully blending the sounds into your own take on something or just be an inspiration to create around the new found sounds. The video accompanying this review seeks to show you just some of the possibilities. Lastly thanks to Shaggy's in Cat City, to RV Velasco for his technical genius and moral support ,to our dogs for adding interest and lastly to Donner for making this all possible. Check out the pedal on the link below. Thanks again Donner Digital Octave Guitar Effect Pedal Harmonic Square 7 modes

As said in title, this is a decent pedal with an okay effect for the money - what i could not get past was the immediate loud aggressive hiss it introduced *by itself* with my bass. It's a darn shame too, because it actually has a nice effect when used in its 1 or 2 octave above effect. 2 octaves was very reminiscent of horns! Sadly, this would be sitting amongst high-end rack mount effects and chained with high end source audio pedals, and i just can't have such a low-end item introducing so much noise. Yeah, i could buy a noise gate, but then the price of the pedal is doubled and a single ledal shouldn't require a 2nd to offset poor quality noisy engineering. Returned it for a refund. This would be a good fit for a teen on a budget, but for a serious older musician this isn't what I'm looking for. *Note, was using a brand-new donner branded power supply for it.

I wanted a pedal that could make my guitar sound like a bass so I can create complete songs on my looper. For the price, this thing does a great job! I turned the wet knob on the pedal all the way up, the dry knob all the way down, and I turned the octave down one step (two steps down was too much). On my guitar, I used the neck pickup and turned the tone knob down to about 1-2. On my amp, I set the bass at 7 and treble at 4. What came out was a nice fat bass sound that didn’t sound muddy. I looped in a bass line for a few riffs I had recorded earlier on my looper and wallah! For $50, I can’t be happier!